Spi 29-333-2 Class Zz Plus Plug Gage 0.333 in

Product Description

The SPI 29-333-2 is a Class ZZ Plus plug gage designed for precision hole measurement in machining and quality control applications. Built from steel, this go/no-go style gage checks that a drilled, reamed, or bored hole meets a 0.333-inch nominal diameter within a tolerance of 0.0002 inches. Class ZZ Plus gages meet tight dimensional standards and are used by machinists, metrology technicians, and quality inspectors who require reliable, repeatable bore verification without elaborate setup. The compact form factor and 0.2-pound weight make it easy to handle during high-volume inspection tasks on the shop floor or in an inspection lab.

This plug gage is suited for production and inspection environments where hole diameters must be verified to close tolerances. Typical applications include incoming material inspection, in-process machining checks, and final quality audits on metal components. It is appropriate for use in job shops, production machining facilities, and precision manufacturing operations where bore size conformance is a critical quality requirement.

Key Features

• 0.333-inch nominal measurement diameter for precise bore verification
• Class ZZ Plus tolerance of 0.0002 inches for tight dimensional control
• Steel construction for durability and dimensional stability
• Lightweight at 0.2 pounds for easy one-handed use during inspection
• Single-piece package quantity supports individual technician use or tool-crib stocking

Compatibility

Designed as an OEM-style precision measurement tool for verifying 0.333-inch diameter bores in standard machined components across metalworking and manufacturing applications.

Installation Notes

Plug gages are handled by metrology technicians and quality control personnel, not typically installed in a system. Store the gage in a protective case away from moisture and temperature extremes to maintain dimensional accuracy. Clean the gage and the bore with a lint-free cloth before measurement to prevent debris from skewing results. Do not force the gage into an undersized hole, as this can damage the gage surface and compromise its calibration.